must feign
Regular verb: feign - feigned- feigned

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must feign
you must feign
he must feign
we must feign
you must feign
they must feign 	I must be feigning
you must be feigning
he must be feigning
we must be feigning
you must be feigning
they must be feigning	I must have feigned
you must have feigned
he must have feigned
we must have feigned
you must have feigned
they must have feigned	I must have been feigning
you must have been feigning
he must have been feigning
we must have been feigning
you must have been feigning
they must have been feigning	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I mustn't feign
you mustn't feign
he mustn't feign
we mustn't feign
you mustn't feign
they mustn't feign 	I mustn't be feigning
you mustn't be feigning
he mustn't be feigning
we mustn't be feigning
you mustn't be feigning
they mustn't be feigning	I mustn't have feigned
you mustn't have feigned
he mustn't have feigned
we mustn't have feigned
you mustn't have feigned
they mustn't have feigned	I mustn't have been feigning
you mustn't have been feigning
he mustn't have been feigning
we mustn't have been feigning
you mustn't have been feigning
they mustn't have been feigning	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I feign?
must you feign?
must he feign?
must we feign?
must you feign?
must they feign? 	must I be feigning?
must you be feigning?
must he be feigning?
must we be feigning?
must you be feigning?
must they be feigning? 	must I have feigned?
must you have feigned?
must he have feigned?
must we have feigned?
must you have feigned?
must they have feigned? 	must I have been feigning?
must you have been feigning?
must he have been feigning?
must we have been feigning?
must you have been feigning?
must they have been feigning? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
mustn't I feign?
mustn't you feign?
mustn't he feign?
mustn't we feign?
mustn't you feign?
mustn't they feign? 	mustn't I be feigning?
mustn't you be feigning?
mustn't he be feigning?
mustn't we be feigning?
mustn't you be feigning?
mustn't they be feigning? 	mustn't I have feigned?
mustn't you have feigned?
mustn't he have feigned?
mustn't we have feigned?
mustn't you have feigned?
mustn't they have feigned? 	mustn't I have been feigning?
mustn't you have been feigning?
mustn't he have been feigning?
mustn't we have been feigning?
mustn't you have been feigning?
mustn't they have been feigning?